Air-pump.



J. A. & F. L. DREEHOUSE.

AIR PUMP.

APPLICATION FILED MAY 23, .1914. RENEWED IuIIE 22.1915.

1,165,157. Patented DemZL 1915.

2 SHEETSSHEET 1.

/ VENTORJ WITNESSES E7272 )7. ream Mia/M hmzijjg v BY A TTOR/VEYS vCOLUMBIA PLANOGRAPH COnWASHINCITON' EC.

l. A. & F. L. DREEHOUSE.

AIR PUMP.

APPLICATION FILED MAY23,1914. RENEWED JUNE 22,1915- 1,165,157, PatentedDec. 21, 1915.

2 SHEETSSHEET 2. 22-47. L. 05

ATTORNEYS JOHN A. DREEHOUSE AND FRED L. DREEHOUSE, 0E LABAIVIIE,WYOMING.

AIR-PUMP.

Specification of Letters Patent.

Patented Dec. 21, 1915.

Application filed May 23, 1914, Serial No. 840,489. Renewed June 22,1915. Serial No. 35,698.

To all whom it may concern: I

Be it known that we, JOHN A.- DREE- HOUSE and FRED L. DREnHoUsn,citizens of the United States, and residents'of Laramie, in the countyof Albany and State of Wyoming, have invented certain new and use fulImprovements in Air-Pumps, of which the following is a specification.

7 Our invention relates to pumps, in the present case to air pumps, andthe main objectthereof is to provide reversing means for the steampistons of such pumps, our invention being particularly designed for usein connection with conventional pumps, as the lVestinghouse' or New Yorkpumps, to dispense with the usual reversing rod and with the 'tappetplate which cause so much trouble at present. v

A further object is to accomplish this result by means of reversingcylinders, one for each of the main pistons, and each of which containsa reversing valve and suitably rected steam passages, for both livesteam and for the exhaust.

A further object is to so construct the reversing mechanism as to bereadily connect-i. ed with either of the pumps mentioned wlthout anyalteration, thereof, otherthan-the removal of certain caps now used.

Our invention is fully set forth in the following specification, ofwhich the accompanying drawings form a part, in which the same referencecharacters are used to designate the same parts in each of the views,and in which Figure 1 is a central, vertical, section taken through themain cylinders of the steam pump actuating mechanism, and showing itsconnection with the air -pump, and also our invention, with the pa rtsinone position; Fig. 2 is asimilar view, with the parts'in alternateposition; and Fig. 3 1s a Fig. 1. p a

In the drawings forming apart of this application we have shown at a theconventional air-pumpand with which the steam cylinders b and c areconnected, as shown at a said cylinders having pistons b? and c inoperative connection with piston rods 6 and c respectively.

plan section taken on the line 3 3 of Arranged beneath the cylinder Z)is a valve chamber d, communicating with a steam pipe d leading to theboiler, and having a vertically movable, centrally arranged, rod 0Ztherein which carries a slide-valve (Z in constant communication with anexhaust piped as clearly shown in Fig. 3, and the rod d extends into thecylinder 6 and downwardly into a reversing cylinder 6Z6 having av freepiston (Z therein, and a steam pipe (Z connects the lower part ofthecylinder 6Z6 with the upper part ofthe cylinder 1), but beneath "theuppermost position of the piston 5 for a reason later explained.

The valve (Z is in constant communication with the exhaust port andpassage (Z leading to the exhaust pipe 03 and said valve is guided'by aprojection cZ within the chamber (Z and, in order not to retard theaction of the piston (Z in the cylinder 03, a vent (Z is provided at theupper end of said cylinder.

, Arranged beneath the cylinder 0 is a valve chamber 6 communicatingwith the steampipe (Z by means of a port 6, and having a verticallymovable, centrally arranged, rod.

therein, and a steam-pipe 6 connects the' lower part of the cylinder 6with the upper part of the cylinder 0, but beneath the uppermostposition of the pistonc as clearly shown in Fig. 2, and said valve 6 isguided by a projection e in the, cylinder 6, and a vent e is provided atthe top of the cyline ei-f In the position of the parts shown in Fig. 1the valve (Z places the exhaust port d in communication with a port fcommunicat ing'with' apassage 7 leading to the cylinder 0, beneaththepiston 0 whereas in Fig.2

perpart of theicylinder 0, above the uppermostposition of the piston 0by means of a passage f In .the first position referred to. thexvalveeplaces the exhaust port e? in communication with a port leading to thebottom of the cylinder 72 through a passage 7 whereas, in the alternateposition of said valve 6*, communication 1s opened between said exhaustport 6 and a port f leading by means of a passage 7 to the upper part ofthe cylinder 6 and above the uppermost position of the piston 6 thesealternate.

positions of the parts being clearly illustrated in Figs. 1 and 2.

With the parts in the state of rest shown in Fig. 1, steam admittedthrough the pipe 01 passes into the valve chamber 0 through the port 7and passage 7 to the upper side of the piston 79 and forces the samedownwardly, the dead steam being exhausted through the passage ffi-valvee, and port a when the piston b strikes the rod d the piston 6 againstthe rod 6 andthus moves the valve e into the alternate position shown inFig. 2; The steam now passes through the valve chamber 6 and the port 7'tothe under side of the piston 6 which is thus forced into uppermostposition, the exhaust belng made through the passage f", port i valve6*, and port 6 when in uppermost po- 'sition, the piston b has clearedthe entrance to the pipe d and the steam passes therethrough, and forcesthe piston d upwardly against the rod (Z and thus moves the valve (Z7into the position shown in Fig. 1; the steam now enters the passage fand passes to the upper part of the piston c which is thus forceddownwardly, the ex-- haust being madethrough the passage 2, port 7,valve d and port d when the piston c has reached its lowermost position,the

valve 6 has been again forced into the position shown in Fig. 1, and theoperation just described is repeated as long as steam is admitted, andit will thus be seen that the two main pistons 71 and c are actuatedalternately in reverse directions, the reversing of the valves for theinlet and exhaust ports being automatic.

.The cylinders valve chambers (Z and e, and valves-a? and e are all ofconventional form, no change being made therein, but we do remove theconventional cap which is screw-threaded into the bottom of each of thevalve chambers,

, and substituting the reversing cylinders (Z and e? therfor, alsothreaded into the cor-- responding valve chambers, having, each, a

f and detachable cap permitting the insertion of the floating valves dand 6 and we also provide the pipes (Z and c and the valve rods d and 6all of these parts, as stated, being added to the conventional structurewithout any alteration in the latter.

It will thus be seen that we provide an automatic reversing mechanismfor the two steam-cylinders of a pump or the like, com= prising a valvefor connecting each side of each of the main pistons with the steamsupply and the exhaust alternately, and means operable by one of saidmain pistons for accomplishing this result on the other main piston,each piston in'the main cylinders actuating the other piston through themedium of the corresponding valve.

Our invention 1s simple though fully eiiicient and is adapted forconnection with certain conventional air-pumps by merely substitutingthe parts shown and described for certain caps now employed, no changein the pumps themselves being needed and, while we have shown a presentpreferred form of construction, it will be obvious that we are notlimited thereto, but may make changes in and modifications thereover,within the scope of the following claims, without departing from thespirit of the in vention or sacrificing its advantages.

. Having fully described the invention, what we claim as new, anddesireto secure bv Letters Patent, is

1. The combination with a pump provided with two main steam cylinders, apiston in' each cylinder, a rod on each piston, a valve chamber casingbeneath each cylinder in communication with the opposite cylinder,aboveand below the piston therein, a valve in each chamber controllingsuch communication, a steam inlet pipeand a steam exhaust pipe inconstant communication with said chambers; of a reversing cylinderscrew-threaded into each valve chamber, a cap detachably securedthereto, a piston in each reversing cylinder, a rod connected with eachvalve and projecting into corresponding main and reversing cylinders,and a pipe connecting the lower portion of each reversing cylinder withthe corresponding main cylinder.

2. The combination with a pumpprovided with two main steam cylinders, apiston in chamber casing beneath each cylinder in communication with theopposite cylinder, above and below the piston therein, a valve in eachchamber controlling-such communi r eachcylinder, a rod on each piston, avalve b and 0, pistons b and 0 in each reversing cylinder, a rodconnected as our invention We have signed our names W1th each valve andpro3ect1ng into-corre- 1n presence of the subscriblng wltnesses.

sponding main and reversing cylinders, and JOHN A. DREEHOUSE. a pipeconnecting the lower portion of each FRED L. DREEHOUSE. reversingcylinder with the corresponding WVitnesses: main cylinder. HERBERT W.CAREY,

In testimony that We claim the foregoing GEORGE W. PATTERSON.

(lopieswof this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

